Adjust docs: Use any negative value for infinite timeout + channel impl

Author: ST-DDT

grpc-client-spring-boot-autoconfigure/src/main/java/net/devh/boot/grpc/client/channelfactory/AbstractChannelFactory.java

@@ -357,7 +357,8 @@ private static class ShutdownRecord {
         public ShutdownRecord(final String name, final ManagedChannel channel, final long gracePeriod) {
             this.name = name;
             this.channel = channel;
-            this.gracePeriod = gracePeriod;
+            // gracePeriod < 0 => Infinite
+            this.gracePeriod = gracePeriod < 0 ? Long.MAX_VALUE : gracePeriod;
         }
 
         long getGracePeriod() {

grpc-client-spring-boot-autoconfigure/src/main/java/net/devh/boot/grpc/client/config/GrpcChannelProperties.java

@@ -270,8 +270,8 @@ public void setKeepAliveWithoutCalls(final Boolean keepAliveWithoutCalls) {
     private static final Duration DEFAULT_SHUTDOWN_GRACE_PERIOD = Duration.ofSeconds(30);
 
     /**
-     * Gets the time to wait for the channel to gracefully shutdown. If set to {@code -1} the server waits forever. If
-     * set to {@code 0} the server will force shutdown immediately. Defaults to {@code 30s}.
+     * Gets the time to wait for the channel to gracefully shutdown. If set to a negative value, the channel waits
+     * forever. If set to {@code 0} the channel will force shutdown immediately. Defaults to {@code 30s}.
      *
      * @return The time to wait for a graceful shutdown.
      */
@@ -280,8 +280,9 @@ public Duration getShutdownGracePeriod() {
     }
 
     /**
-     * Sets the time to wait for the channel to gracefully shutdown (completing all requests). If set to {@code -1} the
-     * channel waits forever. If set to {@code 0} the channel will force shutdown immediately. Defaults to {@code 30s}.
+     * Sets the time to wait for the channel to gracefully shutdown (completing all requests). If set to a negative
+     * value, the channel waits forever. If set to {@code 0} the channel will force shutdown immediately. Defaults to
+     * {@code 30s}.
      *
      * @param shutdownGracePeriod The time to wait for a graceful shutdown.
      */
@@ -458,6 +459,9 @@ public void copyDefaultsFrom(final GrpcChannelProperties config) {
         if (this.keepAliveWithoutCalls == null) {
             this.keepAliveWithoutCalls = config.keepAliveWithoutCalls;
         }
+        if (this.shutdownGracePeriod == null) {
+            this.shutdownGracePeriod = config.shutdownGracePeriod;
+        }
         if (this.maxInboundMessageSize == null) {
             this.maxInboundMessageSize = config.maxInboundMessageSize;
         }

grpc-server-spring-boot-autoconfigure/src/main/java/net/devh/boot/grpc/server/config/GrpcServerProperties.java

@@ -95,8 +95,8 @@ public class GrpcServerProperties {
 
     /**
      * The time to wait for the server to gracefully shutdown (completing all requests after the server started to
-     * shutdown). If set to {@code -1} the server waits forever. If set to {@code 0} the server will force shutdown
-     * immediately. Defaults to {@code 30s}.
+     * shutdown). If set to a negative value, the server waits forever. If set to {@code 0} the server will force
+     * shutdown immediately. Defaults to {@code 30s}.
      * 
      * @param gracefullShutdownTimeout The time to wait for a graceful shutdown.
      * @return The time to wait for a graceful shutdown.